Home / 138,185.64-190,699.84-77,758.42

Finding the Fourth Proportional to 138,185.64, 190,699.84 and 77,758.42

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Solution

The fourth proportional to 138,185.64, 190,699.84 and 77,758.42 is: 107,308.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,185.64 : 190,699.84 = 77,758.42 : x
  2. Step 2: Convert to fraction form
    138,185.64/190,699.84 = 77,758.42/x
  3. Step 3: Cross multiply
    138,185.64x = 190,699.84 × 77,758.42
  4. Step 4: Simplify right side
    138,185.64x = 14,828,518,252.65
  5. Step 5: Solve for x
    x = 14,828,518,252.65/138,185.64
  6. Step 6: Final answer
    x = 107,308.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.